/* ==========================================================================
   KD Slider — スタイル・アニメーション
   ========================================================================== */

/* --- ベースレイアウト --- */
.kd-slider {
    position: relative;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.kd-slider__track {
    position: relative;
    width: 100%;
}

.kd-slider__slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: none;
    z-index: 1;
}

.kd-slider__slide:first-child {
    position: relative;
}

.kd-slider__slide.is-active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.kd-slider__image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.kd-slider__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

/* --- フェードアニメーション --- */
.kd-slider[data-animation="fade"] .kd-slider__slide {
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

/* --- スライドアニメーション --- */
.kd-slider[data-animation="slide"] .kd-slider__track {
    display: flex;
    transition: transform 0.6s ease;
}

.kd-slider[data-animation="slide"] .kd-slider__slide {
    position: relative;
    flex: 0 0 100%;
    opacity: 1;
    visibility: visible;
}

/* --- ズームインアニメーション --- */
.kd-slider[data-animation="zoom-in"] .kd-slider__slide {
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.kd-slider[data-animation="zoom-in"] .kd-slider__slide .kd-slider__image {
    transform: scale(1);
    transition: transform 4s ease;
}

.kd-slider[data-animation="zoom-in"] .kd-slider__slide.is-active .kd-slider__image {
    transform: scale(1.1);
}

/* --- ズームアウトアニメーション --- */
.kd-slider[data-animation="zoom-out"] .kd-slider__slide {
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.kd-slider[data-animation="zoom-out"] .kd-slider__slide .kd-slider__image {
    transform: scale(1.1);
    transition: transform 4s ease;
}

.kd-slider[data-animation="zoom-out"] .kd-slider__slide.is-active .kd-slider__image {
    transform: scale(1);
}

/* --- オーバーレイ（キャッチコピー・ボタン） --- */
.kd-slider__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 3;
    pointer-events: none;
    line-height: 1.6;
}

.kd-slider__caption {
    margin: 0;
    padding: 0 20px;
    font-size: clamp(1.2rem, 3vw, 2.4rem);
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.kd-slider__button {
    display: inline-block;
    margin-top: 16px;
    padding: 10px 32px;
    font-size: clamp(0.8rem, 1.5vw, 1rem);
    font-weight: 600;
    color: #fff;
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid #fff;
    border-radius: 4px;
    pointer-events: auto;
    transition: background 0.3s ease;
    line-height: 1.6;
}

.kd-slider__button:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* --- 矢印ナビ --- */
.kd-slider__arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    border: none;
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    transition: background 0.3s ease;
    padding: 0;
}

.kd-slider__arrow:hover {
    background: rgba(0, 0, 0, 0.6);
}

.kd-slider__arrow--prev {
    left: 16px;
}

.kd-slider__arrow--next {
    right: 16px;
}

/* --- ナビゲーション共通 --- */
.kd-slider__nav {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ドットナビ */
.kd-slider__nav--dots .kd-slider__nav-item {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid #fff;
    background: transparent;
    cursor: pointer;
    padding: 0;
    transition: background 0.3s ease;
}

.kd-slider__nav--dots .kd-slider__nav-item.is-active {
    background: #fff;
}

/* 数字ナビ */
.kd-slider__nav--numbers .kd-slider__nav-item {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid #fff;
    background: transparent;
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.3s ease, color 0.3s ease;
}

.kd-slider__nav--numbers .kd-slider__nav-item.is-active {
    background: #fff;
    color: #333;
}

/* バーナビ */
.kd-slider__nav--bar {
    gap: 4px;
}

.kd-slider__nav--bar .kd-slider__nav-item {
    width: 40px;
    height: 4px;
    border: none;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    padding: 0;
    overflow: hidden;
    border-radius: 2px;
    position: relative;
}

.kd-slider__nav--bar .kd-slider__nav-bar-fill {
    display: block;
    width: 0;
    height: 100%;
    background: #fff;
    border-radius: 2px;
    transition: none;
}

.kd-slider__nav--bar .kd-slider__nav-item.is-active .kd-slider__nav-bar-fill {
    width: 100%;
}

/* --- レスポンシブ --- */
@media (max-width: 768px) {
    .kd-slider__arrow {
        width: 36px;
        height: 36px;
    }

    .kd-slider__arrow--prev {
        left: 8px;
    }

    .kd-slider__arrow--next {
        right: 8px;
    }

    .kd-slider__nav {
        bottom: 12px;
    }

    .kd-slider__overlay {
        padding: 0 16px;
    }

    .kd-slider__button {
        padding: 8px 24px;
    }
}